iOS多线程与网络开发之发送接收服务器信息

 1 （1）.使用同步方法发送get请求（不常用）
 2 /** 发送get消息 */
 3 - (void) testGet {
 4     NSString *requestStr = [NSString stringWithFormat:@"http://192.168.0.21:8080/MyTestServer/login?user=%@&password=%@", self.userField.text, self.passwordField.text];
 5    
 6     NSURL *url = [NSURL URLWithString:requestStr];
 7    
 8     // 默认就是get请求
 9     NSURLRequest *request = [NSURLRequest requestWithURL:url];
10    
11     // 使用同步方法发送请求
12     [self sendSynRequest:request];
13 }
14 
15 /** 同步发送请求 */
16 - (void) sendSynRequest:(NSURLRequest *) request {
17     // 同步发送信息
18     NSData *data = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
19    
20     [self dealWithResponseData:data];
21 }
22 
23 /** 处理返回数据 */
24 - (void) dealWithResponseData:(NSData *) data {
25     // 解析数据
26     if (data) { // 得到返回数据
27         // 解除屏幕锁
28         [MBProgressHUD hideHUD];
29        
30         // 解析json数据
31         NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:nil];
32        
33         // 处理返回的数据
34         NSString *result = dict[@"success"];
35         if (result) {
36             [MBProgressHUD showSuccess:result];
37         } else {
38             result = dict[@"error"];
39             if (result) {
40                 [MBProgressHUD showError:result];
41             }
42         }
43     } else {
44         [MBProgressHUD showError:@"网络繁忙，请稍后再试~"];
45     }
46 }

1 /** 异步发送请求 */
2 - (void) sendAsynRequest:(NSURLRequest *) request {
3     NSOperationQueue *queue = [NSOperationQueue mainQueue];
4     [NSURLConnection sendAsynchronousRequest:request queue:queue completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
5        
6         [self dealWithResponseData:data];
7     }];
8 }

1 @interface ViewController () <NSURLConnectionDataDelegate>

1 /** 使用start & 代理发送、处理异步请求 */
2 - (void) sendAsynRequestWithDelegate:(NSURLRequest *) request {
3     NSURLConnection *connection = [NSURLConnection connectionWithRequest:request delegate:self];
4     [connection start];
5 }

 1 #pragma mark - NSURLConnectionDataDelegate 代理方法
 2 /** 收到服务器回应 */
 3 - (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
 4     NSLog(@"didReceiveResponse");
 5     self.data = [NSMutableData data];
 6 }
 7 
 8 /** 接收到的数据，会调用多次,数据被分割接收 */
 9 - (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
10     NSLog(@"didReceiveData");
11     [self.data appendData:data];
12 }
13 
14 /** 接收数据完毕 */
15 - (void)connectionDidFinishLoading:(NSURLConnection *)connection {
16     NSLog(@"connectionDidFinishLoading");
17     [self dealWithResponseData:self.data];
18 }

 1 #pragma mark - post
 2 - (void) testPost {
 3     NSString *requestStr = [NSString stringWithFormat:@"http://192.168.0.21:8080/MyTestServer/login"];
 4     NSURL *url = [NSURL URLWithString:requestStr];
 5    
 6     NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
 7     request.timeoutInterval = 5;
 8    
 9     // 设置为post方式请求
10     request.HTTPMethod = @"POST";
11    
12     // 设置请求头
13     [request setValue:@"ios" forHTTPHeaderField:@"User-Agent"];
14    
15     // 设置请求体
16     NSString *param = [NSString stringWithFormat:@"user=%@&password=%@", self.userField.text, self.passwordField.text];
17     request.HTTPBody = [param dataUsingEncoding:NSUTF8StringEncoding];
18    
19     // 发送请求
20     // 使用主线程来处理UI刷新
21     NSOperationQueue *queue = [NSOperationQueue mainQueue];
22     [NSURLConnection sendAsynchronousRequest:request queue:queue completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
23         [self dealWithResponseData:data];
24     }];
25   
26 }

1     // 使用可变request
2     NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
3     // 设置请求超时时间
4     request.timeoutInterval = 5;

1     NSString *requestStr = [NSString stringWithFormat:@"http://192.168.0.21:8080/MyTestServer/login?user=%@&password=%@", self.userField.text, self.passwordField.text];
2    
3     // 由于url不能传送中文，所以需要转码
4     requestStr = [requestStr stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];